docstr: Overwrites the len(...) function.
  
  Returns:
      The number of samples in the subset.
docstr_tok: ["Overwrites","the","len","(","...",")","function",".","Returns",":","The","number","of","samples","in","the","subset","."]
code: def __len__(self) -> int:
      """Overwrites the len(...) function.
  
      Returns:
          The number of samples in the subset.
      """
      return len(self.filenames_subset)
  
file_path: lightly/lightly/data/lightly_subset.py
imports: from typing import Dict, List, Tuple
  from lightly.data.dataset import LightlyDataset
label_desc: Use image node_id 3 for calling the LightlySubset obj's underlying member method code with example usage: obj.__len__() and returns: len